| Mercury Games | DeveloperPublisher | |
| Mercury Steam Entertainment | Developer | |
| MercuryBD | Developer | |
| MercurySteam | DeveloperPublisher | |
| Mere Mortals | Developer | |
| Merge Games | DeveloperPublisher | |
| Mericita | Developer | |
| Meridian4 | DeveloperPublisher | |
| Merit Software | DeveloperPublisher | |
| Merit Studio | Developer | |
| Merit Studios | DeveloperPublisher | |
| Merj Media | Publisher | |
| Merlandese | Developer | |
| Merle | Developer | |
| Merlijn Van Holder | Developer | |
| MerlinTheWizard | Developer | |
| Mermaid Studios | Developer | |
| Mernok | Developer | |
| Merow | Developer | |
| Merpui | Developer | |
| Merry Hospelhorn | Developer | |
| Merscom | DeveloperPublisher | |
| MeruJane | Developer | |
| Merve | Developer | |
| Merve Rida | Developer | |
| Mervin James | Developer | |
| Mervyn J Estcourt | Developer | |
| Mervyn J. Estcourt | Developer | |
| Mesa Logic | Developer | |
| Mesange Arts | Developer | |
| Mesitas | Developer | |
| Mesmerize Games | Developer | |
| MessBuilds | Developer | |
| MessagedGames | Developer | |
| Messhof | DeveloperPublisher | |
| Messij | Developer | |
| Meta Publishing | Publisher | |
| MetagameMike | Developer | |
| Metagaming B.V. | Developer | |
| MetalCat | Developer | |
| MetalChouchen | Developer | |
| MetalGameDev | Developer | |
| MetalZebra | Developer | |
| Metaleptic | Developer | |
| Metalfusion | Developer | |
| Metalhead Software | DeveloperPublisher | |
| Metalmastery | Developer | |
| Metalstorm | Developer | |
| Metamorf Studios | Developer | |
| Metamorpho_SG | Developer | |
| Metanet Software | DeveloperPublisher | |
| Metaparadox | Developer | |
| MetaphoricalSheep | Developer | |
| MetaphysicsStudios | Developer | |
| Metarevelations | Developer | |
| Metater | Developer | |
| Metellus | Developer | |
| MeteorArts | Developer | |
| Meteotrix | Developer | |
| Methodic Solutions | DeveloperPublisher | |
| Metrax | Developer | |
| MetricZero | Developer | |
| Metricsystem | Developer | |
| Metro | DeveloperPublisher | |
| Metro 3D | DeveloperPublisher | |
| Metro 3DEU | Publisher | |
| Metro Corporation | DeveloperPublisher | |
| Metro Graphics | Developer | |
| Metro3D | DeveloperPublisher | |
| Metro3D Europe | Publisher | |
| Metro3D NA | Publisher | |
| Metro3D, Inc. | Publisher | |
| Metro3DEU | Publisher | |
| Metro3DEU,NA | Publisher | |
| MetroJP | Publisher | |
| Metroixer | Developer | |
| Metronomik | Developer | |
| Metropolis Software | Developer | |
| Metropolis Software House | DeveloperPublisher | |
| Metylene | Developer | |
| Mev Dinc | Developer | |
| MevLyshkin | Developer | |
| MevnieEnn | Developer | |
| Meyer | Developer | |
| Meyush | Developer | |
| Mez Breeze | Developer | |
| Mezix | Developer | |
| Mezorno | Developer | |
| Mezzelo | Developer | |
| Mgaia Studio | Developer | |
| Mgame USA Inc. | Publisher | |
| MhamadTahir44 | Developer | |
| MhrGames | Developer | |
| Mi-Clos Studio | Developer | |
| Mi1k | Developer | |
| MiCROViSiON | Developer | |
| MiCROViSion | Developer | |
| MiCROViSion Inc. | Developer | |
| MiFuWorks | Developer | |
| MiSou Games | Developer | |
| Mia Bentzen | Developer | |
| Miaro | Developer | |
| MiawXyz | Developer | |
| Mic | Developer | |
| MicDoes | Developer | |
| Mica Alexander | Developer | |
| Micah Jones | Developer | |
| MicahBailety | Developer | |
| Micaka | Developer | |
| MichTron Corp. | Publisher | |
| Michael | Developer | |
| Michael Lishnor L. | Developer | |
| Michael "Kayin" O'Reilly | Developer | |
| Michael A. Sanderson | Developer | |
| Michael Abbot | Developer | |
| Michael Abbot and Matthew Alexander | Developer | |
| Michael Abrash | Developer | |
| Michael Bateman | Developer | |
| Michael Batty | Developer | |
| Michael Bauer | Developer | |
| Michael Berlyn | Developer | |
| Michael Blanke | Developer | |
| Michael Bonardi | Developer | |
| Michael C. Neel | Developer | |
| Michael Cranford | Developer | |
| Michael Crichton | Developer | |
| Michael Darling | Developer | |
| Michael Davies | Developer | |
| Michael Denio | DeveloperPublisher | |
| Michael Derek | Developer | |
| Michael Farren | Developer | |
| Michael Fox | Developer | |
| Michael Fuchs | Developer | |
| Michael Grand | Developer | |
| Michael Grieshofer | Developer | |
| Michael Hicks | DeveloperPublisher | |
| Michael J. Lindner | Developer | |
| Michael Jaramillo | Developer | |
| Michael Katz & Tom Johnson | Developer | |
| Michael Klamerus | Developer | |
| Michael Klier | Developer | |
| Michael Koloch | Developer | |
| Michael Krone | Developer | |
| Michael Macha | Developer | |
| Michael Miriti | Developer | |
| Michael Noland | Developer | |
| Michael O'Connell | Developer | |
| Michael Ouye | Developer | |
| Michael Owens | Developer | |
| Michael P. Miller | Developer | |
| Michael P. Welch | Developer | |
| Michael Packard | Developer | |
| Michael Poltronieri Tang | Developer | |
| Michael R Ryan | Developer | |
| Michael Reilly | Developer | |
| Michael Rfdshir | Developer | |
| Michael Riedel | Developer | |
| Michael S. Gentry | Developer | |
| Michael Sandford | Developer | |
| Michael Schenck | Developer | |
| Michael Shillingburg | Developer | |
| Michael Sim | Developer | |
| Michael St Aubyn | Developer | |
| Michael Steven Hoenie | Developer | |
| Michael Stout | Developer | |
| Michael Swan | Developer | |
| Michael Todd | DeveloperPublisher | |
| Michael Todd Games | DeveloperPublisher | |
| Michael Van Vleet | Developer | |
| Michael Vivaldini | Developer | |
| Michael W. Lawrence | DeveloperPublisher | |
| Michael Weiss | Developer | |
| Michael Wise | Developer | |
| Michael Wolf | Developer | |
| Michael Wolliston | Developer | |
| Michael Wührer | DeveloperPublisher | |
| Michael Zahniser | Developer | |
| Michael Zeledon | Developer | |
| Michael Zerbo | DeveloperPublisher | |
| MichaelArts | DeveloperPublisher | |
| MichaelBellekens | Developer | |
| MichaelFlaherty | Developer | |
| MichaelMoroz | Developer | |
| MichaelSoft | DeveloperPublisher | |
| MichaelSollarsGames | Developer | |
| MichaelToddGames | Developer | |
| Michael_Boxface | Developer | |
| Michael_dev6; | Developer | |
| Michael_is_playing | Developer | |
| Michaela Joffe | Developer | |
| Michaela Laws | Developer | |
| Michaela Thisten | Developer | |
| Michal Marcinkowski | Developer | |
| MichalDev | Developer | |
| Michalidis | Developer | |
| Michał IXI Kobzdaj | Developer | |
| Micheal A. Swenson | Developer | |
| Micheal Sewell | Developer | |
| Michel Lacerda | Developer | |
| Michel Pagni | Developer | |